Magic or not, if you get dirt(which is abrasive) in the cloth, it's like sanding your paint, magic voodoo cream or not.
Has the use of water been banned ? I'm just old school I 'spose.

2005 Model . Two Fast Eddy stickers , a bell and a clock . She's Lola . She tinkles and keeps time . http://s649.photobucket.com/albums/uu211/britbike05/